Safe portable sprayer

Abstract

A safe portable sprayer comprising a reservoir for storing clean water that can be carried on the back or attached the shoulders, including a large nozzle on the upper face thereof, a small nozzle with a water pump adapted thereto, and a small neck that is provided with a cap. The cap is screwed on the nozzle, and includes a recipient that fits into the nozzle. The cap is provided with vertical holes that pass through a channel. The holes are provided with inner threads for receiving corresponding valves having lower tapered ends. Inside the recipient, flexible containers of chemicals are attached to the holes; the containers are kept immersed and compressed by water inside the recipient from the pump, such that the pressure generated by the water impels the water and chemical toward the channel of the cap, and to the spraying gun through the pipe.

The invention claimed is: 
     
       1. A safe portable sprayer with a reservoir ( 1 ) for storing clean water that can be carried by the user on his back or attached to his shoulders by belts connected to the reservoir by straps, the reservoir comprising:
 a large nozzle ( 3 ) on an upper face of the reservoir including threads formed on an outer cylindrical surface, 
 a small nozzle ( 4 ) with a water pump ( 20 ) adapted to the small nozzle, and 
 a small neck for feeding water provided with a first cap ( 27 ), 
 wherein a second cap ( 5 ) having threads formed on an outer cylindrical surface comprising a lower wall of the second cap is screwed on the large nozzle ( 3 ), so that a recipient ( 7 ) that fits into the large nozzle ( 3 ) and extends as far as a bottom of the reservoir ( 1 ) is provided therein; 
 wherein a tightness between the second cap ( 5 ), the nozzle ( 3 ) and the recipient ( 7 ) is assured by fixtures ( 48 ,  49 ,  50 ) disposed therebetween, 
 wherein the second cap ( 5 ) is provided with a plurality of vertical holes ( 15 ) that pass through a horizontal channel ( 8 ) inside a higher wall of the cap ( 5 ); 
 wherein the holes ( 15 ) are provided above the channel ( 8 ) with an inner thread that receives corresponding valves ( 17 ) having lower tapered ends for closing the holes ( 15 ) below the channel ( 8 ) when displaced at an end of a lower course of the valves; 
 wherein flexible containers ( 19 ) inside the recipient ( 7 ) are configured for containing a concentrated chemical attached to the holes ( 15 ) through hydraulic couplers ( 16 ) and are kept immersed and compressed by a body of water inside the recipient ( 7 ) which is fed by the pump ( 20 ) located beside the recipient ( 7 ) and inside the reservoir ( 1 ), and 
 wherein a repression valve ( 25 ) of the pump ( 20 ) communicates with the recipient ( 7 ) through a pipe ( 26 ), in such a way that a pressure inside the recipient ( 7 ) generated by the water pumped from the reservoir ( 1 ) impels the water and chemical towards the channel ( 8 ) of the second cap ( 5 ), thus forming a solution that moves toward a spike ( 9 ), where the channel ( 8 ) is connected to the spraying gun ( 11 ) through the pipe ( 10 ). 
 
     
     
       2. The safe portable sprayer according to  claim 1 , wherein a circular rim ( 6 ) of the cylindrical recipient ( 7 ) is positioned on the rim of the large nozzle ( 3 ) inside the second cap ( 5 ), the second cap ( 5 ) provided with the horizontal channel ( 8 ) that is disposed diagonally and interconnected laterally with the spike ( 9 ) for receiving the pipe ( 10 ) that extends as far as the spraying gun ( 11 ) that is provided with a poppet valve ( 12 ), a tubular extension ( 13 ) and a spraying nozzle ( 14 ). 
     
     
       3. The safe portable sprayer according to  claim 1 , wherein one of the hydraulic couplers ( 16 ) is provided with a tube ( 18 ) that extends as far as the bottom of the recipient ( 7 ), while each of the other couplers( 16 ) receives a corresponding flexible container ( 19 ) containing a concentrated chemical. 
     
     
       4. The safe portable sprayer according to  claim 1 , wherein the water pump ( 20 ) is of the piston type and extends downwards as far as the bottom of the reservoir ( 1 ) in such a way that a the rod ( 21 ) of the piston ( 22 ) protrudes upward, where a third cap ( 23 ) is screwed on the small nozzle ( 4 ); and wherein two aspiration and repression valves ( 24 ,  25 ), respectively, are assembled on a lower portion of the small nozzle ( 4 ), which communicates with the recipient ( 7 ) by a pipe ( 26 ). 
     
     
       5. The safe portable sprayer according to  claim 1 , wherein the pump ( 20 ) is of the hydraulic type and powered by sucking water from the reservoir ( 1 ) and pressing same in the recipient ( 7 ). 
     
     
       6. The safe portable sprayer according to  claim 1 , wherein the second cap ( 5 ) is provided with cylindrical protuberances ( 27 ) on an upper portion thereof where the externally threaded valves ( 17 ) are housed, the second cap also provided with a groove and sealing ring ( 28 ) and ending in a tapered portion that fits into the hole ( 15 ) right below the channel ( 8 ). 
     
     
       7. The safe portable sprayer according to  claim 1 , wherein each hole ( 15 ) extends downward on the lower face of the second cap ( 5 ) towards a center of the cylindrical protuberance ( 29 ) the lower end of which is provided with an inner thread; wherein the hole ( 15 ) is provided with a narrowing ( 30 ) half way to the protuberance ( 29 ), and houses in an upper portion a first pin ( 31 ) that protrudes a little below the narrowing ( 30 ) and extends upward as far as a bushing ( 32 ); wherein the first pin ( 31 ) is provided with a circular widening ( 33 ) near the narrowing ( 30 ) and just above the narrowing, so that the hole ( 15 ) is blocked when the first pin goes down and contacts the narrowing ( 30 ); and wherein a helical spring ( 34 ) that is wrapped around an upper portion of the first pin ( 31 ) between the punctured bushing ( 32 ) and the widening ( 33 ) pushes the first pin ( 31 ) down, thus forcing the first pin ( 31 ) to block the hole ( 15 ). 
     
     
       8. The safe portable sprayer according to  claim 1 , wherein the cylindrical protuberance ( 29 ) below the narrowing ( 30 ) is provided with a concentric parallel hole ( 35 ) having a diameter that is higher than a diameter of the upper portion of the hole ( 15 ) that is provided with a ring-shaped fixture ( 36 ); wherein a cylindrical hollow second pin ( 37 ) with a slightly tapered tip is embedded into the hole ( 35 ) and assembled close to the narrowing ( 30 ) of the hole ( 31 ), the second pin ( 37 ) provided with a circular rim ( 38 ) on a lower portion thereof that contacts with a lower portion of the protuberance ( 29 ), the second pin ( 37 ) also provided with an extension ( 39 ) that acts as a neck spike for the neck of the container ( 19 ). 
     
     
       9. The safe portable sprayer according to  claim 1 , wherein the hollow portion of the second pin ( 37 ) is a cylindrical concentric hole ( 40 ) the upper portion of which having a narrowing ( 41 ) for receiving a third pin ( 42 ) that is provided with a circular protuberance ( 43 ) that extends downward as far as a bushing ( 44 ) attached to the hole ( 40 ); wherein a helical spring ( 45 ) that is disposed on the punctured bushing ( 44 ) is wrapped around the third pin ( 42 ) and presses the circular protuberance upward so that it can block the narrowing ( 41 ). 
     
     
       10. The safe portable sprayer according to  claim 1 , wherein a plug ( 46 ) having a metered through-hole is screwed on or embedded into the lower portion of the hole ( 40 ); and wherein the second pin ( 37 ) is attached to the protuberance ( 29 ) of the second cap ( 5 ) through a nipple ( 47 ) that supports the rim ( 38 ) internally and is screwed on the protuberance ( 29 ). 
     
     
       11. The safe portable sprayer according to  claim 1 , wherein, alternately, the holes ( 15 ) are sealed by a pressure on a diaphragm ( 51 ), the second cap ( 5 ) in this case is horizontally divided into two parts with the diaphragm ( 51 ) between same, which two parts are attached to each other by bolts ( 52 ) or rivets in such a way that the valve ( 17 ) only pushes the diaphragm downward against the edge of the hole ( 15 ), thus closing it. 
     
     
       12. The safe portable sprayer according to  claim 1 , wherein the cap ( 5 ) has either a coupler ( 16 ) for only one container ( 19 ) or two, three or more couplers ( 16 ) for receiving the containers ( 19 ) containing different chemicals as selected by the user. 
     
     
       13. A safe portable sprayer with a reservoir ( 1 ) for storing clean water that can be carried by the user on his back or attached to his shoulders by belts connected to the reservoir by straps, the reservoir comprising:
 a large nozzle ( 3 ) on an upper face of the, 
 a small nozzle ( 4 ) with a water pump ( 20 ) adapted to the small nozzle, and 
 a small neck for feeding water provided with a first cap ( 27 ), 
 wherein a second cap ( 5 ) is screwed on the large nozzle ( 3 ), so that a recipient ( 7 ) that fits into the large nozzle ( 3 ) and extends as far as a bottom of the reservoir ( 1 ) is provided therein; 
 wherein a tightness between the second cap ( 5 ), the nozzle ( 3 ) and the recipient ( 7 ) is assured by fixtures ( 48 ,  49 ,  50 ) disposed therebetween, 
 wherein the second cap ( 5 ) is provided with a plurality of vertical holes ( 15 ) that pass through a horizontal channel ( 8 ) inside a higher wall of the cap ( 5 ); 
 wherein the holes ( 15 ) are provided above the channel ( 8 ) with an inner thread that receives corresponding valves ( 17 ) having lower tapered ends for closing the holes ( 15 ) below the channel ( 8 ) when displaced at an end of a lower course of the valves; 
 wherein flexible containers ( 19 ) inside the recipient ( 7 ) are configured for containing a concentrated chemical attached to the holes ( 15 ) through hydraulic couplers ( 16 ) and are kept immersed and compressed by a body of water inside the recipient ( 7 ) which is fed by the pump ( 20 ) located beside the recipient ( 7 ) and inside the reservoir ( 1 ), 
 wherein repression valve ( 25 ) of the pump ( 20 ) communicates with the recipient ( 7 ) through a pipe ( 26 ), in such a way that a pressure inside the recipient ( 7 ) generated by the water pumped from the reservoir ( 1 ) impels the water and chemical towards the channel ( 8 ) of the second cap ( 5 ), thus forming a solution that moves toward a spike ( 9 ), where the channel ( 8 ) is connected to the spraying gun ( 11 ) through the pipe ( 10 ), 
 wherein the cylindrical protuberance ( 29 ) below the narrowing ( 30 ) is provided with a concentric parallel hole ( 35 ) having a diameter that is higher than a diameter of the upper portion of the hole ( 15 ) that is provided with a ring shaped fixture ( 36 ); and 
 wherein a cylindrical hollow second pin ( 37 ) with a slightly tapered tip is embedded into the hole ( 35 ) and assembled close to the narrowing ( 30 ) of the hole ( 31 ), the second pin ( 37 ) provided with a circular rim ( 38 ) on a lower portion thereof that contacts with a lower portion of the protuberance ( 29 ), the second pin ( 37 ) also provided with an extension ( 39 ) that acts as a neck spike for the neck of the container ( 19 ).